Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X75S
The AirTAC Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X75S is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 30mm and 75mm give 4 controllable stop positions across a 105mm total travel, with a Ø40mm bore, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Stroke 130 mm
- Stroke 275 mm
- Total travel105 mm
- Positions4 stops
- Port sizePT1/4
About the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X75S
The SCT40X30X75S is a tandem multi-position cylinder providing four discrete rod positions: 0 mm (retracted), 30 mm, 75 mm, and 105 mm total travel. Each 40 mm bore section delivers 628 N of push force at 0.5 MPa, making it suitable for diverting or sorting tasks where two distinct extended stops are needed without complex servo controls.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for reliable position feedback. The 16 mm diameter rod and PT1/4 ports handle operating pressures from 0.15 to 1.0 MPa, with an adjustable air cushion of 21 mm at each end to manage deceleration. The body length A is 235 mm.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X75S Technical Specifications
| Model | Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X75S |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke 1 / Stroke 2 | 30 / 75 mm |
| Total travel | 105 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke / section | Up to 500 mm standard |
Specifications follow the official AirTAC SCT (multi-position) datasheet. SCT is available in bores 32–100; each of the two sections has a 500 mm max standard stroke (800 mm max). Confirm against the product label before installation. Thread options: PT (standard) / G.
Stop Positions (4)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 30 mm |
| P2 (section 2) | 75 mm |
| P3 (both extended) | 105 mm |
Positions are set by pressurising section 1, section 2, or both. With equal strokes you get 3 distinct positions; with unequal strokes you get 4.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Force is per actuated piston section (single-piston, same as the SC bore): push uses the full bore area, pull subtracts the rod area. Size with a safety margin.
Model Code: Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X75S
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm (SCT range 32–100). |
| ×30 | Stroke 1 (section 1) in mm. |
| ×75 | Stroke 2 (section 2) in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod), SCD (double rod), SCJ (adjustable stroke). SCT mounting: Basic, FA, FB, CA, CB, LB. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X75S Is Used
Two-Stop Diverter Gate
Actuates a product gate to three positions—closed, partial-open at 30 mm for small items, and full-open at 105 mm for large packages—using simple pneumatic controls.
Multi-Level Part Staging
Positions a stop pin at 75 mm to hold a pallet and at 105 mm to release it, while the 30 mm position provides a sensor check height, all from one cylinder body.
Dual-Depth Press Assist
Provides two controlled pressing depths in a light assembly fixture, extending first to 30 mm for an insertion step and then to 105 mm for a final seating operation.
Is the Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X75S the Right Cylinder?
Choose the SCT when your application needs two separate fixed extension points from a single compact actuator, avoiding the cost and complexity of two individual cylinders with external stops. If your load requires greater thrust, stepping up to the 50 mm bore SCT provides 982 N of push per section at 0.5 MPa. For a direct replacement, match the 40 mm bore, the exact 30 mm and 75 mm strokes, PT port thread, and the -S magnet option. Basic mounting is standard, but FA or LB brackets can be added if front-flange or foot mounting is preferred.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 30 + 75 mm suit your layout?
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Plumb the two sections to the correct valves for each stop.
- check Adjust end cushion screws for smooth stops.
- check Use SCT mounting accessory (FA / FB / CA / CB / LB).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCT32-63 Multi-Position Tandem Air Cylinder SCT40X30X75S FAQ
It provides four discrete mechanical stops: 0 mm (fully retracted), 30 mm (first section extended), 75 mm (second section extended), and 105 mm (both sections extended). The positions are fixed by the two stroke lengths and are not infinitely variable.
No, the SCT does not have an internal locking mechanism. If air pressure is removed or a valve centers, the piston can drift. To securely hold a load at an intermediate position without live pressure, you must add an external rod brake or a pilot-operated check valve.
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